Epson EQUITY 3865X/20 PLUS - Manual (Page 133)

3.
4.
The sockets are labelled as shown below.
U16 U17 U20 U21 U24 U25
bank 0 bank 1 bank 2
If an option card is blocking access to the SIMM sockets,
follow the steps on page 6-9 to remove the card(s).
Hold the SIMM so the component side is facing to the left
and the metal connector pins are facing down.
components
connector pins
Installing and Removing Options 6-13